Grinding-machine for mower and reaper knives



(-No Model.) 2 Sheets-Sheet 1.

EJH. PE TON.

V GRINDING MACHINE FOB; MOWER AND RBAPER KNIVES.

No. 402,152. Patented Apr. 30, 1889.

WITNESSES. INVENTUR K 1 f W WTORW (No Model.) 2 Sheets-Sheet 2L B.-H.FEN-TO-N. GRINDING MACHINE FOR M OWER AND REAPER KNIVES.

o. 402.152. PatentedApr. so, 1889.

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1 I ATTORNEY N. PEYERS. Fhnto-Lithugnpher. Wauhingtcn. m;-

UNITED STATES" PATENT OFFICE.

EPHRAIM H. FENTON, OF KANSAS CITY, MISSOURI.

GRINDING-MACHINE FOR MOWER AND REAPERTKNIVES.

SPECIFICATION forming part of Letters Patent No. 402,152, dated April 30, 1889.

Application filed February 21, 1888- Serial No. 264,865- (No model.) 7

To all whom it may concern.-

Be it known that I, EPHRAIM I-I. FENTON, a

citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Grinding-Machines for Mower and Reaper Knives; and I do hereby declare that the following is a full, clear,

and exact description of the same, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming a part of this specification.

This invention is an improvement upon the grinding-machine for which Letters Patent of the United States No. 342,789 were granted to me, and bearing date the 1st day of June,

' spending parts in the drawings.

of the upper and lower horizontal rack and the intermediate pinion. Fig. 5 is a perspective view of the end portion of the table for the mower-knives, showing the slot in the end for receiving the extension of said table. Fig.

6 is a perspective view of the extensions of the reciprocating table.

In the construction of the invention and upon the base or bed A is mounted a stand ard, B,jthe upper end of which is forked, as

at b b. The opposite forked ends I) b are perforated in a horizontal relation, as at b,

and through said perforations is introduced,

so as to turn freely, one end of a shaft, 0. Upon the opposite end of the shaft 0 is mounted an external annular cog-wheel, C, of the proper dimensions to form a drivingwheel. A tool-frame, D, is then formed, consisting of two parallel arms, cl d, connected between the opposite ends by transverse bars d cl. The opposite portions d d, at one end of frame D, are made to fit against the respective outer side portions of the forked ends I) b of the standard B, and are perforated in a transverse relation, as at (P, to receive the shaft 0, which passes through said perforations. The frame D extends from the shaft 0 radially a short distance beyond the periphery of the wheel C and vibrates freely on shaft 0.

Between the side of the contiguous portion 61 of the frame D and the wheel 0 on shaft 0 is placed a sleeve, 0, and through the end of shaft 0 which extends beyond the side of the opposite arm, a, is inserted a pin, 0 which pin and sleeve prevent any lateral movement of the Wheel 0.

In the opposite ends cl d of the frame D to that attached to shaft 0 are joined boxes (1 and j ournaled in a transverse relation in said j ournal-boxes is a mandrel, (1 which extends to a point beyond the inner side of the-wheel O, and upon said mandrel, opposite to and meshing with the cogs on said wheel 0, is keyed a gear, (1

Upon the mandrel d, between the opposite arms cl (1 of the tool-frame D, is fitted rigidly the grinding-disk D, which is similar in form 'to opposite truncated cones joined at their bases, and is preferably made of emery.

. Upon the portion of the bed A lying in front of the emery-wheel D is mounted a horizontal reciprocating table, E, parallel with the shaft (1 In the side portion of table E, opposite the disk D, is made a V- shaped opening corresponding to that between the opposite teeth in the knives of a mower or reaper.

For the purpose of enable the table Eto be reciprocated between two adj u stable points of resistance, and thus enable the grinding to be effected in degrees and to the same extent on the separate teeth, I make, first, tw'o racks, e e, which are placed on the bed A at right a11- gles to and beneath the table E a proper distanceapart and in a parallel relation. The

said racks c are retained in their position to each other by transverse bars c c which extend horizontally from one to an opposite rack at one end and at a point intervening, and from the outer side of said racks extend horizontally and at diverging angles from each rack the bars c e' c*. The racks and bars are preferably cast in one piece, and upon the extreme ends of the bars 6 c e e are cast in a vertical relation the standards e e e c".

To the standards of e at their upper ends is attached in a horizontal relation the opposite ends of a rod, c and a rod, 0, is attached in a similar manner to the standards c 6. Upon the under and opposite longitudinal side portion of the reciprocating table E are the lugs e" 6 which are perforated at their lower ends in a transverse relation to the said table E and at a distance apart corresponding to that of the rods e c which rods are passed through the said perforations in said lugs and the table reciprocated thereon. The lugs e which are diagonally opposite each other, extend a short distance below the others on the rods 6 c. Through the standard 6 a short distance below the rod is made a screw-threaded perforation, c, and in said perforation, from a position on the side near the emery-wheel D, is inserted a thumb-screw, e whieh impinges against the lug e on that side of the table E. Through the standard c", from a position on the opposite side of the table and below the rod 6*, is introduced a thumb-screw, c, which impinges against the the lug e of the table E.

Upon the under side portion of the table E, directly over the racks e a, two cog-wheels, ff, are then made, which are made to engage with the upper and lower racks e e at the respective ends of the table. The cog-wheels f f are rigidly connected by means of a central shaft, f and to said shaft is attached rigidly an operating-handle, E. Upon the side of table E opposite to that having the V- shaped opening for the emery-wheel is cast or formed the support c e, and on said support is formed a vertical extension, c", the upper portion of which is cut away at an angle inclined at 6 toward the table E. For the purpose of holding the knives a cam, G, is then formed, consisting of a short longitudinal perforated cylinder, g, from the side of which at right angles and between opposite ends extends the horizontal arm g. The lower portion of the cylinder 9 is cut awayin a transverse relation at an angle of inclination corresponding to that of the portions 6".

From the side of the cylinder 9 opposite to that having the arm g and at the upper end extends horizontally an arm, 5/. Through the portion (2" of the support 0 is then made a vertical perforation, and a bolt, 9 having a head, g, is inserted through said perforation on the support and through the cylinder g and a suitable distance above said cylinder, and a cap, 9 fitted to the end of said bolt. I

then place a spring, on the bolt g", which bears at one end on the cylinder g and the opposite end on the cap g, so that the arm g is under tension.

For the purpose of lengthening the table E,

in the end of said tableis formed alongitudinal rabbet, c and in a transverse relation to the table E and beneath the said rabbet is formed a cross-bar, c I then make an extension, II, for said table E of the same relative width and of any desired length, the 0pposite ends of which are provided with a lip, 71, of the width of the rabbet c and which lip is cut away in a horizontal relation a distance nearly one-half of the relative thickness of the said extension H and extending longitudinally to a point between the shoulder h and the end of the lip equal to the depth of the rabbet e in the table E. Upon the under side of the extension H of the table, at a point between the shoulders h and the end of the lip h, are placed the lugs 7L2, which are so far removed from the shoulder h" as to pass within the rabbet e and permit the extension 11 to lie in the horizontal plane of the table and prevent its withdrawal in that position.

In the operation of my improved machine the tool-frame 1) is held by the hand above the plane of the table. The mower-knives are laid upon said table and arranged in regular order, so as to he opposite the V-shaped opening. The cam G is then turned by means of the handle g, and its portion 9 approaches the knives of the mower, and when at right angles with the table E rests upon and retains said knives from removal. The emerywheel D is then placed upon the teeth of the mower-knives in position to receive it, and upon the rotation of the wheel 0 by means of the handle 0 the recoil of the mowerknives and the table from the grinding-wheel is equally distributed, and any undue concussion of said wheel upon the table or mowerknives, which would otherwise injure the cam, is obviated by its spring.

To make the grinding uniform, the handle F on shaft f is moved upward and downward, which operates the gear f and reciprocates the tableE to and from the emery-wheel D, and in either direction the lugs e e abut against the ends of the respective thumbscrews 6 a, so that as the said screws are adjusted to limit the distance between opposing ends, and also from the sides of the standards 6 e e e, and said ends of screws, the movement of the table is controlled in corresponding degrees, so that the edges of the mowerknives are ground equally. l'leretofore the mower -knives, which are of considerable length, when laid upon the table were with difficulty kept in a horizontal plane, and in the service of my extension I am enabled to accomplish the change of position of the knives in the path of the emery-wheel with greater dispatch.

IIO

Having fully described my invention, what I now claim as new, and desire to secure by Letters Patent, is

1. In a grinding-machine, the combination,

' with the base having a suitable standard, of a driving-wheel, a Vibrating tool-holder pivotally attached at one ,end to said standard and having a rotary grinding-tool at its opposite end in power connection with said driving-wheel, a reciprocating table having a suitable support opposite parallel racks upon A said base of themachine and upon the under portion. of said table, and cog-gear meshing with said racks, means for rotating said coggear, and adjustable stops in the path of said table, as described.

2. In a grinding-machine, the combination,

with the base having a suitable standard, of

a driving-wheel, a vibrating tool-holder attached at one end to said standard and having a rotary grinding-tool at its opposite end in power connection with said driving-wheel, a table adapted to support the knives to be ground in the path of said grinding-tool provided with a vertical bolt, a cylinder on said bolt provided with a cam at its lower end,

radial arms on said cylinder, one of which extends in the plane of and across said table, and a spring on said bolt having one portion connected with the bolt-and the opposite'portion resting upon said cylinder, for the purpose desc'ribed.

EPHRAIM H. FEN'ION.

\Vitnesses:

J. W. BENTON,

ALONZO P. JOHNSON. 

